Timing error detection and correction for power efficiency: an aggressive scaling approach
|Rathnala, Prasanthi, Wilmshurst, Tim and Kharaz, Ahmad H.
Low-power consumption has become an important aspect of processors and systems design. Many techniques ranging from architectural to system level are available. Voltage scaling or frequency boosting methods are the most effective to achieve low-power consumption as the dynamic power is proportional to the frequency and to the square of the supply voltage. The basic principle of operation of aggressive voltage scaling is to adjust the supply voltage to the lowest level possible to achieve minimum power consumption while maintaining reliable operations. Similarly, aggressive frequency boosting is to alter the operating frequency to achieve optimum performance improvement. In this study, an aggressive technique which employs voltage or frequency varying hardware circuit with the time-borrowing feature is presented. The proposed technique double samples the data to detect any timing violations as the frequency/voltage is scaled. The detected violations are masked by phase delaying the flip-flop clock to capture the late arrival data. This makes the system timing error tolerant without incurring error correction timing penalty. The proposed technique is implemented in a field programmable gate array using a two-stage arithmetic pipeline. Results on various benchmarks clearly demonstrate the achieved power savings and performance improvement.
|Error detection; Error correction; Low-power electronics; Field programmable gate arrays
|IET Circuits, Devices & Systems
|Digital Object Identifier (DOI)
|Web address (URL)
|06 Dec 2018
|Publication process dates
|06 Dec 2018, 14:55
|06 Sep 2018
Archived with thanks to IET Circuits, Devices & Systems
"This paper is a postprint of a paper submitted to and accepted for publication in IET Circuits, Devices and Systems and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library"
|University of Derby
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